Strap wrench



May 30, 1933. J. P. DERINGER ET AL 1,911,815

STRAP WRENCH Filed March 28, 1932 Patented May 30, 1933 warren STATESJOHN P. DEBINGER, OF NEW YORK,- AND FREDERICK." n. nnninenn, orSHEBRILL,

NEW YORK STRAP WRENCH Application filed March 28,

This invention relates to pipe wrenches, and more particularly to pipewrenches of the strap type especially adapted for use in connection withsmooth cylindrical surfaces.

Pipe wrenches of the strap type haveloeen found highly desirable becauseof their ability to be readily adjusted to accommodate many sizes ofpipe, and at all times insuring a positive grip, However, the structureof strap wrenches heretofore employed has rendered theiradjustment-somewhat inconvenient due to the difiiculty of sliding thestrap through slots in thewrench, the strap having its natural tendencyto bind and resist sliding movement. Also, some care and skill isrequired in properly adjusting the strap to the proper tightness about apipe to enable rapid and effective manipulation.

It is an object of this invention to provide a strap wrench having astrap which may be readily and conveniently adjusted without the usualannoyance due to binding.

A .further object is the provision of a strap wrench which may bequickly adjusted to a pipe without any especial care or skill, andwithout affecting the gripping action.

A further object is the provision of a strap wrench having a straphaving associated therewith nonslipping means to increase the grippingaction. I v

These and other advantageous objects, which will later appear, areaccomplished by the simple and practical construction and arrangement ofparts hereinafter described and exhibited in the accompanying drawing,forming part hereof, and in which Figure 1 represents a side elevationalview of a pipe wrench embodying our invention, applied to a pipe, shownin crosssection, v

Figure 2 repres elevational view of Figure 1,

Figure 3 represents a top the wrench shown in Figure 1,

Figure 4 represents a perspective view of one end of the strap used inour device,

Figure 5 represents a side elevational plan view of metalstop 18 whichis to securely grip the'strap, that increase in the force exerted in acoun-" the :strap. "above described enables ready adjustment of 1001932. Serial No. 601,518.

view of the wrench shownin Figure 1, in its" double-acting form,

Figure 6 represents a perspective View of a modified form of wrench andshowing the manner of applying the wrench to a plpe Y Figure 7represents a vertical sectional view. of the, form of invention shown inFigure 6, and

Figure 8 represen view thereof. I

Referring to the drawing, in Figure 1 is shown the preferred form of ourinvention, in which a strap wrench includes a block 5, having at oneside thereof an in- 65 clined slot 6 passing through one side of I theblock and the rounded gripping surface 7 of the block, said grippingsurface 7 projecting beyond each side of the block.

Opposite the rounded gripping surface 7, 70 the block 5 has a pair ofshort, inclined sur- Y faces 8 and 9, which pass through ears 10projecting from the block. Pivoted to the ears 10 by means ofa pin 11 isa head 12 having a flat surface 13 adapted to cooperate with either ofthe inclined surfaces 8 or 9 to grip a strap ashereinafter explained.The head 12 is manipulated by means ofa handle 14 attached thereto. I

A strap 16 passes through the slot 6, and its movement is'limited by anysuitable or convenient means, as, forrinstance, by a held ina loop ofthe strap, (see Fig. 4:) the loop being formedby folding the strap backon itself and securing the portions together by a s a side elevational6o rivet '17.

the strap 16 is passed I and the free end of the strap is passed overthe inclined surface 9 and between the ears 10 7 ,In operation, around apipe,

as shown in Figure 1'. The head '12 ismo'ved to cause the flatsurface 13to nts a fragmentary side 8 of the block 5 it being obvious cooperatewith the surface terclockwise direction on the handle 14;, will increasethe gripping action of thehead on 1 It is clear that the ,s't'ructurethe strap to fit any size of pipe without in any way impairing thegripping action of the wrench. The strap 16 is preferably made from astrong fabric and has an inner coating 20 of a desirable non-slippingmate rial, such as carborundum, garnet, crepe rubber, or the like. 3

In some instances, it is desired to make the wrench double acting, thatis, able to turn a pipe in either direction without adjustment of thestrap, as in the form shown in Figure 5. For this purpose, the block 5is provided with the inclined slot 19, opposite to and similar to theslot 6. The strap is passed around the pipe asabove described, and thenthrough the slot 19, and thenover the inclined surface 9 and'betweentheears 10. The pipe may now be rotated in either direction by causingthe flat surface 13 of the head 12 to grip either inclined surface 9 orinclined surface 8.

It is not essential that the surfaces 8 and 9 be inclined, as far as thegripping action is concerned, but by making them inclined there is lesscutting action on the strap and this feature is of considerableimportance in increasing the life of the strap.

In Figures 6 and 7 is shown a modified formof the invention in which ablock tachably fixed therein,

has a pair of inclined slots 31' and 32 therein, which pass through thesides of the block and the gripping surface 33 of the block. A strap 36passes through slot 31 and is de preferably by means such asja pin 37which prevents the strap from being pulled through slot 31. The strap islooped above the surface 33 and the free end of the strap is then passedthrough inclined slot 32 and thence through a transverse slot 34 in theblock. If desired, the free end of the strap 36 may, instead, be firstpassed through the slot 31, then looped over the surface 33 and theopposite side of the block, and thence through the transverse slot 34 ofthe block, as shown in dotted lines -in- Figure 7. A handle 35 isdetachably connected to the block. The above structure is double-acting,and enables a pipeto .be rotated in either directionwithout neces- Vsitating adjusting the strap. The strap 36 said opposite flat Withoutdeparting from the general scope herein indicated and denoted in theappended claims.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent, is:

1. A strap wrench, comprising a block having an inclined slot thereinand a fiat surface, ears projecting from said block, a head pivoted tothe ears, a strap passing through and fixed in the slot, and a flatsurface on the head adapted to cooperate with the fiat surface of theblock to tightly grip the strap.

2. A strap Wrench, comprising a block having a slot therein and arounded gripping surface projecting beyond the sides of the block, saidblock having an inclined flat surface on the side opposite the roundedgripping surface, a strap passing through the slot and over the inclinedsurface, a head pivotally connected to the block, said head having aflat surface substantially parallel to and cooperating with the inclinedfiat surface to grip the strap, and a handle attached to the head.

3. A strap wrench, comprising a block having a strap attached to oneside thereof, said block having an inclined flat surface over which thestrap passes, and a head pivota lly connected to the block, said headhaving a fiat surface adapted to cooperate with the inclined flatsurface to tightly grip the strap.

. 4. Astrap wrench, comprising a block having a strap attachedthereto,said block having a gripping surface and an opposite fiat surface overwhich thestrap passes, and a head pivotally connected to the block, saidhead having a flat surface cooperating with surface to tightly grip thestrap.

This specification signed this 23rd day of March, 1932.

FREDERICK E. DERIN GER.

This specification signed this25th day of March, 1932.

' JOHN P. DERIN GER.

is preferably made of fabric lined with a non-slipping material as aboveexplained.

While the above description discloses the strap wrench adapted for useonpipes and the like, it is obvious that the strap Wrench may be made ofmany sizes and may be readily-adapted for use in various situations, andmay be used as a kitchen utensil, for removing screw type covers fromjars, bottles and the like. r I

- The foregoing disclosure isto be regarded as descriptive andillustrative only, and not as restrictive or limitative of theinvention, of which obviously an embodiment may be constructed includingmany modifications

